Joseph h



(No Model.)

' JAI-I. MILLIGAN.

SELF LEVELING. BBRTH POR SHIPS. N0.. 291,070 Patented Jan. 1, .1884.

N. PETKRS. Pbulu-Lnhugmplwr. vlamingen D, C.

UNITED STATESA PATENT irren,

JOSEPH H. MILLIGAN, OF BOSTON, MASSACHUSETTS, ASSIIGNOR OFONE-HALF TO WILLIAM NEWSOME, OF SAME PLACE.

SELF-LEVELING BERTH FOR SHIPS.

sPEcrFrcA'rroN forming part of Letters Patent No. 291,o7o,4daeed January 1, 1884.

` Application filed September 14, 1883. (No model.)

T all whom, it may concern:

Be it known that I, J osnrn H. MILLIGAN, of Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Ships Berths,of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming a part of this specification, in Which- Figure l 'is a vertical longitudinal section, including` a side elevation of a portion of the crib; Fig. 2, an end view of the crib, showing the guard; Fig. 3, a vertical transverse section; Figs. 4 and 5, views of the supportingplates, and Fig. 6 a view showing the frictionbearing.

Likeletters of reference indicate corresponding parts in the different gures of the drawings.

My invention relates to that class of ships berths which are self-leveling; and it consists in a novel construction and arrangement ofthe parts, as hereinafter more fully set forth and claimed, by which a simpler, cheaper, and more effective device of this character is produced than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation, its extreme simplicity rendering an elaborate .description unnecessary.

In the drawings, A represents the Walls of the state-room; B, the bunk, and C the crib.

The bunk is rectangular in form, and is provided with ends D, which project below its sides, as shown at E, and are curved on their lower edges and provided with the frictionrollers m. Projecting laterally from each of the ends D, on its outer face and near its upper side, there is a stud, x, on which the bunk is suspended, the studs resting on a series of friction-rollers, a, properly disposed in vertically elongated bearings t in the end Walls o f the state-room. Attached to eitherend of the state-room there is a curved bearing,G,on which the rollers m rest.

rlhe crib O, which corresponds in forni with 5o the bunk, is suspended therein by means of the plates H, one of which is centrally se* cured to either side of the crib. These plates are provided at their upper ends with laterally-proj ecting studs Z, on which the crib is suspended, their lower ends being curved and provided with the friction-rollers h, which rest upon curved bearings J, attached to the inner sides of the bunk. The studs Z project intoV vertically-elongated bearings f, formed in the sides of the bunk, and rest upon a series of 6o friction-rollers, j, which are properly disposed therein insubstantially the same manner as the studs .fr rest upon the rollers a in the bearings t.

Hinged to either end of the crib there is a guard-board, K, provided with friction-rollers p, the object of the guards being to prevent the clothing from falling down between the crib and. bunk, and also to prevent the crib from swinging too freely, this being accomplished 7o by pressing against the board and forcing the rollers p against the end of the bunk, thereby steadying the crib.

Disposed beneath either end of the crib C, in a socket, c, attached to the inner face ofthe 7 5 curved projection, E, there is a coiled spring, a, acting expansivcly against the under side of the crib to afford it a yielding support at these points. Y Y

From the foregoing it will be obvious that 8o the bunk B is suspended in the state-room and Aswings laterally on the studs x, and that the crib C is suspended in the bunk and swings longitudinally on the studs Land that, in case either of the studs break, the curved bearings G J will prevent the bunk or crib from falling, as the case may be. The distance from the center of the stud l to the bearing-point of the roller h represents one-half the diameter of a circle, which has a greater circumference 9o than the circle of which the bearing J forms a segment, so that when the crib vibrates or tends to rotate around the stud l as its center of motion the rollers h will be brought into forcible contact with the bearing J as they appreach its ends, and thereby tend to level the crib or cause it to assume a horizontal position, the studs Z rising in the elongated slots or bearings f as the rollers approach the ends of the bearing J. The curved bearing Galso bears 10o the same relation to the bunk B that the bearing J does to the. crib C, and tends to level or bring the bunk into a horizontal position in substantially the same manner as the bearing J levels the crib, the studsrising and falling in the bearings i as the rollers m approach and recede from the ends of the bearing G. A sliding bar, L, provided with the pivoted hand-lever M, is attached to the side of the crib, its end fitting into the socket t in the head of the bunk B, and acting to lock the crib or prevent it from vibratin r, When desired. l `rictionrollers w are also inserted in the sides of the crib Where it is liable to be bronghtinto contact With the sides of the bunk, and also at g/ between the ends of the bunk and state-room.

Having thus explained 1ny invention, what I claim isl. In a self-leveling ships berth, the guardboards K, provided with the rollers p, in combination with the crib C, substantially as and for the purpose set forth.

2. In a self-leveling ships berth, the elongated bearings 1', provided with the frictionrollers a, in combination With the bunk B,

provided with the studs x, to enable said bunk to rise and fall as the rollers m approach and recede from the ends of the curved bearing G, substantially as specified.

3. In a self-leveling ships berth, the elongated bearings f, provided with the frictionrollers j, in combination with the crib C, provided with the studs Z, to enable said crib to rise and fall as the rollers h approach and recede from the ends of the curved bearing J, substantially as set forth.

l. The improved self-leveling ships berth herein described, the same consisting of the bunk B, provided With the studs bearings J, rollers m, springs n, and bearings f, and the crib C, provided with the studs I, rollers h, bar L, and guardsK, in combination with the Walls A, provided with the curved bearings G, and elongated bearings yf, constructed,com bined, and arranged to operate Substantially as specified.

JOSEPH H. MILLIGAN.

Vitiiesses:

C. A. SHAW, L. J. VHITE. 

